Rehabilitate and restore damaged or destroyed ecosystems

Iloilo River Esplanade is a promenade and linear park along the Iloilo River, created as part of the Iloilo River Rehabilitation Project. It is the largest linear park in the Philippines and was designed by the landscape architect Paulo Alcazaren. The esplanade is one of a kind in the country that aims to foster biodiversity, store carbon by mangroves and provide protection from possible flood damages. Furthermore, the project aspires to build a lifestyle hub for the locals and promotes educational eco-tourism. The site was an existing dike road devoid of shade and originally built just as a flood control measure. The redesign has showcased its effect on public amenities, received several recognitions and has become a magnet for tourists in this city. [1, 3, 6, 7]

The Central Forest Corridor surrounds the capital of Honduras, Tegucigalpa, and provides various ecosystem services to the population, with a particular emphasis on providing water for communities within both the corridor and Tegucigalpa (Ref. 3). However, limited access to water is common across Honduras, attributed to the degradation of watersheds as a result of deforestation and pollution of both ground and surface water (Ref. 1). Climate scenarios further "indicate that existing water scarcity will be exacerbated by climate change and increasing variability"... with "the main urban areas (Tegucigalpa and San Pedro Sula) and several agricultural areas (Patuca basin)...fac[ing] increased water scarcity in the near future" (Ref. 1).

In April 2021, the Kochi City Corporation in collaboration with the World Resources Institute (WRI) and ICLEI South Asia inaugurated the Subhash Bose Park after a thorough renovation. The project was part of the overarching project "INTERACT-Bio" by ICLEI South Asia and the KAWAKI initiative by the WRI (part of the Cities4Forests movement in Kochi). The initiative was launched to demonstrate the application of Nature-Based Solutions (NBS) for climate mitigation in Kochi. The project aims to develop urban grooves similar to the traditional grooves that once existed in Kerala. Additionally, with this project, ICLEI South Asia aimed to address the problems of climate change through mainstreaming biodiversity objectives across the city. The park plays as a major carbon sink at the heart of the city that is home to over 300 species of native trees and many more species of native plants. Furthermore, the Kochi City Corporation is focused on increasing native biodiversity and communicating the importance of this biodiversity to residents in order to ensure long term conservation efforts. This was a key motivator for the city in the conceptualization of the garden which not only improves the native biodiversity of the city but also serves as a demonstration site for nature education. The park also includes a newly built pollinator garden that has augmented the pollinator base in the city. [1, 4, 7, 10]

"Siargao It Up" is the mangrove conservation programme in Del Carmen, Siargao Islands of the Philippines. The municipality of Del Carmen hosts the largest mangrove forest in the Philippines – consisting of 4,871 hectares as of 2018. This mangrove forest is the habitat of rare and endangered species of flora and fauna both in marine, wetland and terrestrial areas. This ecosystem helps maintain the island's ecological balance by providing rich breeding grounds for aquatic lives. Furthermore, the forest plays a key role in capturing and storing carbon and helps the Philippines to meet its goal of carbon emission reduction. In addition to creating habitats and storing carbon, the forest also protects the community from the inevitable effects of climate change disasters. Recently, in December 2021, it was able to protect the residents from the onslaught of Typhoon Odette. [1, 2, 3]

Droughts are one of the most serious threats to water availability, food security, and local livelihoods in the semi-arid areas of Tanzania. Drought condition is coupled with a rainfall deficit and poor rainfall distribution. In Tanzania, drought conditions are observed more frequently in the country's northern and central portions (Arusha, Manyara, Shinyanga, Simiyu, and Dodoma). This consideration was paramount when in 2019, the Municipality of Dodoma, alongside ICLEI - Local Governments for Sustainability, erected a new garden positioned in a square in the centre of the city. Nyerere Square in Dodoma used to be an open, concrete space with the statue of Julius Kambarage Nyerere the only attraction apart from the informal traders scattered along the main walkway. Nyerere is the former prime minister and president of Tanganyika, as Tanzania was known before, and subsequently president of Tanzania. It would prove challenging to sustain such an initiative in this drought-prone city. To ensure the park outlived the project, the team installed a greywater system to irrigate the new garden and ensure there was always sufficient water to help the plants flourish. (1,2,3)

South Africa is struggling to provide services to the millions of poor people migrating to the major centres and living in informal settlements (shanty towns), built on land that was formerly used for agriculture or pasturage. Vegetation is sparse and the open spaces between the houses are generally of beaten earth. These areas face persistent challenges that undermine health and everyday well-being and increased disaster risk due to their poor design and lack of green infrastructure. Moreover, informal settlements are very vulnerable to flooding events, which affect the quality of life of the people living in them. Such a case is Diepsloot, a settlement in Johannesburg, where a team of researchers implemented a sustainable urban drainage system with the purpose of alleviating poor water infrastructure and addressing issues related to land erosion and environmental degradation. This research has been benefiting from the support of the local population through adaptive co-management and joint implementation of the intervention. (1,2)

Delhi Development Authority (DDA) has established a network of Biodiversity Parks in Delhi with unique landscapes that harbour a diversity of plants, animals and microbes living in ecologically sustainable biotic communities and rendering multiple ecological services. Presently there are seven Biodiversity Parks developed by DDA located across the landforms of Delhi. These parks have a mosaic of habitats with rich floristic and faunistic diversity that function as a dynamic ecosystem. They have ecosystem processes such as organic matter decomposition, regeneration of plants, pollination, resting and nesting of birds and colonisation by other animals. The biodiversity parks in Delhi have proved to provide extreme essential services by creating ecological corridors and maintaining the genetic diversity in an urban setup. Furthermore, these parks have shown substantial potential in storing carbon and other pollutants and help in mitigating climate change. [2, 3]

The Rioni River basin is the second largest in Georgia, originating in the Greater Caucasus range and flowing into the Black Sea, traversing the town of Samtredia. Samtredia has been affected directly on many occasions by floods that have become a current occurrence in the Rioni River basin as of late. The underlying causes of vulnerability to climate change in the Rioni basin can be categorised into 1) physical factors –direct manifestations of climate change, 2) factors caused by anthropogenic intervention – those related to the harmful ways in which humans have and continue to interact with the environment which has exacerbated vulnerability and 3) Institutional factors – related to the legislative/regulatory barriers placed by government and other institutions, as well as limited capacity (human and resources) to manage climate change vulnerability. Flooding has been harmful not only to the local population but also to the biodiversity of the area, which suffered losses and an ecological imbalance and a disruption in the habitat patterns of local fauna. Many of these issues became the focal point of an activity developed by the Adaptation Fund alongside the Georgian government as early as 2012. The intervention stretched for 4 years and involved several localities in the Rioni River Basin, including Samtredia municipality, consisting of creating bank terracing, vegetative buffers, and tree revetments in order to address floods related to the Rioni River basin and the localities it traverses. (1,2)

The Ras Mekonnen Urban Park is part of a larger intervention developed by ICLEI (an international NGO focused on the promotion of sustainable development) with the Addis Ababa municipality alongside the Shega river that crosses a nearby neighbourhood. The location of the park was initially used by locals as a dumping site affecting not only the quality of life of the inhabitants but also contributing to the environmental degradation of the area. As more and more people discarded their waste here, the small river running through the site, a tributary of the Shega River, became increasingly overgrown and inaccessible, resulting in a derelict, run-down space in an otherwise vibrant urban area. As such, action was needed, which eventually resulted in the rehabilitation of the river and the creation of the park, which now can be enjoyed by all the inhabitants of the Ras Makonnen neighbourhood. (1,2)

Typically considered dividers of the urban space, ravines ('barrancos') which run through Guatemala City are being targeted for an overhaul of their reputation and are instead being reframed as a way to bring people and their environment together (Ref. 3). Now metamorphosed into a grassroots movement, 'Barranqueando' "wants to continue integrating the ravines with the urban environment to generate ecological, social and economic benefits for their city", where the unexplored potential of the ravines can be realised as areas to "serve as natural reserves, as nodes and paths for sustainable mobility throughout the city, as rainwater collectors, as crucial carbon sinks, as well as for purifying and cooling the air" (Ref. 3).

One of the first projects of the movement was the development of Jungla Urbana, an ecological park that brought together a ravine and the adjacent urban space, "giv[ing] residents the opportunity to wander through largely untouched nature – and experience the natural ecology of the site their city is built on", and providing an area to "...explore how the city’s unique ecosystem can be used to benefit its citizens – ecologically, socially and economically" (Ref. 3).